CN101904074A - Wireless energy transfer - Google Patents

Abstract

An apparatus (200) comprising monitoring circuitry (230) configured to monitor a resonant frequency of a supply source (100), a receiving component (211a), and a control unit (220) configured to vary a resonant frequency of said receiving component (211a), wherein the apparatus (200) is configured to vary the resonant frequency of said receiving component (211a) in dependence upon the resonant frequency of said supply source (100).

Description

Wireless energy transfer

Technical field

The present invention relates to wireless energy transfer, and particularly but the non-wireless energy transfer that exclusively relates between power supply and the receiving-member.

Background technology

For example the mancarried electronic aid of mobile phone or laptop computer and so on is powered by rechargeable chemical cell often.Generally speaking, this class battery is releasably connected to the main body of portable equipment.

It is not satisfactory that battery is used for powering to mancarried electronic aid, because the energy storage capacity of chemical cell is limited.Thereby chemical cell must just be recharged at regular intervals.

For a kind of device that is used for battery recharge is provided, provide charger unit to portable equipment usually, so that allow electric energy flow to rechargeable battery from network supply (mains power supply).Traditionally, charger unit comprises the cable that is used to be connected to the plug of network supply socket and is used for this plug is connected to portable equipment.

Be disadvantageous like this, because if network supply socket easily not, this situation is present in most of open airs and the PE usually, and then the electric power of rechargeable battery can exhaust and portable equipment will need outage.

Because this class charger unit needs the physical connection between portable equipment and the network supply socket, so its use also is disadvantageous in this.This has seriously limited portable equipment moving between charge period, thereby has negated portability of equipment.

The charger unit utilization of another type be traditional short distance inductance coupling high principle, it relates to the main inductor of energy from charger unit and transfers to less important inductor in the portable equipment.For example, this class charger unit is normally used for charging for the rechargeable battery in the electric toothbrush.

Utilize the charger transferring electric power wirelessly of the inductance coupling high of this quasi-tradition, therefore do not need the physical connection between network supply and the portable equipment.Yet the ultimate range that can realize active power transmission is limited in the distance with the physics size same order of inductance.For mancarried electronic aid, the size of inductance is limited by the size of mancarried electronic aid.Therefore, usually, when anything distance during greater than several centimetres, for this class electric power transfer, to such an extent as to the energy transmission efficiency between the main and less important inductor is too low infeasible.

Therefore,, use the electric power transfer of traditional inductance coupling high to need charger unit and portable equipment very contiguous, this means that moving of portable equipment is seriously limited as above-mentioned cable.

Except above-mentioned with recharge the problem that is associated, chemical cell is also had some other shortcomings as power supply.For example, the life-span of rechargeable chemical cell is limited, and can be along with wearing, and their maximum storage capacity also trends towards reducing.And chemical cell is heavier relatively, this means that comprising chemical cell in portable equipment has increased many percentage to the gross weight of equipment amount usually.If can reduce the dependence of equipment to chemical cell, then the mancarried electronic aid such as mobile phone can become light a lot.

Summary of the invention

This declarative description a kind of equipment, comprising: supervisory circuit is configured to the resonance frequency of monitoring power supply; Receiving-member; And control unit, being configured to change the resonance frequency of described receiving-member, wherein said equipment is configured to change according to the resonance frequency of described power supply the resonance frequency of described receiving-member.

Described receiving-member can be suitable for being coupled from described power supply wireless ground received energy by resonant inductance.

Described receiving-member can comprise the adaptive reception parts with variable resonant frequency.

Described equipment can be configured to the described resonance frequency of the described resonance frequency of described receiving-member and described power supply is complementary.

Can in described receiving-member, come induced potential, and described control unit can be configured to change the described resonance frequency of described receiving-member to mate the described resonance frequency of described power supply by the magnetic field that generates by described power supply.

Described equipment can also comprise a plurality of electric components, and described equipment can be configured in these electric components at least one electric energy is provided.

Described equipment can also comprise battery, and it is used for not providing electric energy at least one of described electric component when described power supply receives energy.

Described equipment can comprise mancarried electronic aid.

Described equipment can comprise mobile phone, PDA(Personal Digital Assistant) or laptop computer.

Described equipment can comprise phase-locked loop circuit, and it is configured to export control signal, is used for changing according to the described resonance frequency of described power supply the described resonance frequency of described receiving-member.

This specification has also been described a kind of equipment, comprising: the device that is used to detect the existence of power supply; Be used to monitor the device of the resonance frequency of described power supply; And the device that is used for changing the resonance frequency of receiving-member according to the described resonance frequency of described power supply.

Described receiving-member can be configured to receive electric energy by the wireless non-radiative energy transmission from described power supply, and can be configured to provide the electric energy that receives to rechargeable battery.

This specification has also been described a kind of equipment, comprise the receiving-member that is used for from power supply wireless ground received energy with variable resonance characteristic, the described resonance characteristic of wherein said receiving-member can change mating the resonance characteristic of described power supply, thereby improves the efficient from described power supply received energy.

Described equipment can also comprise supervisory circuit, is used to detect and monitor the described resonance characteristic of described power supply.

The described receiving-member of described equipment can comprise the adaptive reception parts with variable resonance characteristic, and described equipment can also comprise control unit, is configured to change automatically the described resonance characteristic of described adaptive reception parts to mate the described resonance characteristic of described power supply.

Described equipment can also comprise one or more electric components, and described receiving-member can be coupled to power supply circuits with at least one power supply in these electric components.

Described equipment can also comprise battery, and being used for is not providing electric energy at least one of described electric component when described power supply receives energy.

Described equipment can comprise mancarried electronic aid.

Described equipment can comprise mobile phone, PDA(Personal Digital Assistant) or laptop computer.

Described equipment comprises phase-locked loop circuit, and it is configured to export control signal, is used for changing according to the described resonance frequency of described power supply the described resonance frequency of described receiving-member.

This specification has also been described a kind of system, comprising: power supply and equipment, and described equipment comprises: supervisory circuit is configured to monitor the resonance frequency of described power supply; Receiving-member; And control unit, being configured to change the resonance frequency of described receiving-member, wherein said equipment is configured to change according to the resonance frequency of described power supply the described resonance frequency of described receiving-member.

This specification has also been described a kind of method, comprising: detect the existence of power supply; Monitor the resonance frequency of described power supply; And the resonance frequency that changes receiving-member according to the described resonance frequency of described power supply.

Described method can also comprise: from phase-locked loop circuit output control signal, be used for changing according to the described resonance frequency of described power supply the described resonance frequency of described receiving-member; And the described resonance frequency of described receiving-member and the described resonance frequency of described power supply be complementary.

Described method can also comprise: be coupled from described power supply wireless ground received energy by resonant inductance at described receiving-member place.

Described receiving-member can comprise the adaptive reception parts with variable resonant frequency, and described method can also comprise: use the magnetic field that is generated by described power supply to come induced potential in described adaptive reception parts; And the described resonance frequency that changes described adaptive reception parts is to mate the described resonance frequency of described power supply.

Described method can also comprise to electronic equipment provides electric energy.

Described method can also comprise when not providing energy from battery at least one parts of electronic equipment when described power supply receives energy at described receiving-member place.

Described method can also comprise: be coupled from described power supply received energy by resonant inductance at described receiving-member place; And provide the energy that receives by the resonant inductance coupling at least one parts of electronic equipment.

This specification has also been described a kind of computer program that is stored on the storage medium, and it is arranged to carry out a kind of method when being carried out by processor, and described method comprises: detect the existence of power supply; Monitor the resonance frequency of described power supply; And the resonance frequency that changes receiving-member according to the described resonance frequency of described power supply.

Description of drawings

In order to understand the present invention more fully, by illustrative example embodiment is described referring now to accompanying drawing, in the accompanying drawing:

Fig. 1 shows energy flow to mancarried electronic aid from device for feeding schematic diagram.

Fig. 2 is that coupling coefficient is the circuit diagram of the main and less important RLC resonator circuit of K.

Fig. 3 is the circuit diagram that is used for the Equivalent Transformer circuit of the first and second RLC resonator circuits shown in Fig. 2.

Fig. 4 is the circuit diagram of the simplification circuit of the Equivalent Transformer circuit shown in Fig. 3.

Fig. 5 shows the impedance of each parts of the Equivalent Transformer circuit shown in Fig. 3.

Fig. 6 be two between the resonator power transmission efficiency and the graphic extension of the relation between the difference of the resonance frequency of resonator.

Fig. 7 is to use traditional inductance coupling high energy to be wirelessly transmitted to the diagram of mancarried electronic aid from device for feeding.

Fig. 8 is to use the resonant inductance coupling energy to be wirelessly transmitted to the diagram of the mancarried electronic aid of intermediate range (mid-range) from device for feeding.

Fig. 9 is the schematic diagram that comprises the mancarried electronic aid of reactance and supervisory circuit.

Figure 10 shows the schematic diagram of the parts of the wireless power transmission equipment in the mancarried electronic aid.

Figure 11 shows the schematic diagram of the adaptive reception parts in the wireless power transmission equipment of mancarried electronic aid.

Figure 12 shows the circuit diagram of one group of exemplary components among the PLL ASIC that comprises in the wireless power transmission equipment of portable equipment.

Figure 13 shows and is used for to the measurement winding of PLL ASIC feed signal and the circuit diagram of adaptive reception examples of members.

Figure 14 shows and initiates the flow chart that wireless power transmits the step that is associated by the resonant inductance coupling.

Embodiment

Referring to Fig. 1, device for feeding 100 comprises power supply 110, is used for wirelessly powering to mancarried electronic aid 200.Power supply 110 comprises the main reactance of being coupled to electric circuit 112, for example comprises main inductor 111.Electric circuit 112 can be connected to power supply alternatively, and to be used for providing electric current to electric circuit 112, described power supply for example comprises network supply 300.Main inductor 111 has inductance L ₁₁₁, Q factor (quality factor) Q ₁₁₁With resonance frequency f _{0 (111)}

It will be understood to those of skill in the art that the electric current main inductor 111 of flowing through can make producing magnetic field 400 around main inductor 111.As shown in fig. 1, disappearance (evanescent) magnetic field 400 that produces around inductance 111 penetrates the outside of device for feeding 100, means the effect that is subjected to magnetic field 400 in the environment around.For example, magnetic field 400 can be used to induced potential in the receiving-member that comprises less important reactance (such as the less important inductor in the electric equipment).This be by traditional short distance inductance coupling high carry out wireless non-radiative energy transmission based on principle.Yet effective wireless energy transfer of being undertaken by the short distance inductance coupling high of this quasi-tradition is limited in the distance of the order of magnitude identical with the physical size of related inductance in the power transfer.

As what will fully describe below, mancarried electronic aid 200 is suitable for coming received energy wirelessly by the inductance coupling high of replacing type.The inductance coupling high of this replacement type will be called as the resonant inductance coupling.

By using the resonant inductance coupling, and come the potential range of transmission of power to compare with traditional inductance coupling high, can use the non-radiative energy transmission to come effective transmission of power on longer distance.This means that resonant inductance is coupling in when being used for power transfer provides the bigger degree of freedom and flexibility than traditional inductance coupling high.As be described in greater detail below, the resonant inductance coupling is based on the inductance coupling high between power supply and the receiving-member, and power supply and receiving-member comprise the inductance of fine tune to same frequency.The inductance at receiving-member place can be by tuning so that carry out resonance on the frequency of power supply inductance.For example, the resonance frequency f of power supply ₀Resonance frequency f with receiving-member ₀Can be equal to each other.

More particularly, if the resonance frequency f that is associated with main reactance ₀(the resonance frequency f that is associated with inductance 111 in the device for feeding 100 for example _{0 (111)}) can equal the resonance frequency f that is associated with less important reactance ₀(receiving-member that for example comprises less important inductor in the mancarried electronic aid 200), if so main reactance is in the magnetic field that generates around the main reactance, then, can between main reactance and less important reactance, realize effective wireless non-radiative energy transmission that distance is longer than adopting traditional inductance coupling high.

For example, can being coupling in the last realization of distance than the big at least order of magnitude of physical size of the inductance that is used for this transmission by resonant inductance, to have efficient be tens percent wireless energy transfer.

The general example that is coupling in two non-radiative wireless energy transfer between the inductance by resonant inductance provides below.

Referring to Fig. 2, show main and less important RLC resonator circuit 500,600.Main rlc circuit 500 comprises the first inductor (L ₁) 510, the first capacitor (C ₁) the 520 and first resistor (R ₁) 530.Less important rlc circuit 600 comprises the second inductor (L ₂) 610, the second capacitor (C ₂) the 620 and second resistor (R ₂) 630.In this example, L ₁=L ₂And C ₁=C ₂

Main rlc circuit 500 is connected to power supply, comprises time-dependent current source (i _SUPPLY(t)) 540.The time dependence of current source 540 makes electric current can adopt sinusoidal wave form, and it is tuned to the resonance frequency f of first and second rlc circuits 500,600 ₀, promptly

$f_0=\frac{1}{2\mathrm{\&pi;}\sqrt{L_1{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HPA00001160385800031.png,HPA00001160385800051.png"\; state="\{\{state\}\}">C</figure-callout>}}_1}}=\frac{1}{2\mathrm{\&pi;}\sqrt{L_2{C}_2}}$

Second rlc circuit 600 is connected to load, is expressed as DC current source (i in Fig. 2 _LOAD) 640.When between first and second rlc circuits 500,600 not during transmission of power, be zero from the electric current of DC current source 640.

The Q value that is associated with first and second resonator circuits 500,600 is represented by first and second resistors 530,630.As will being explained in more detail below, the size of the Q value of resonator circuit 500,600 is directly proportional with energy transmission efficiency between the circuit 500,600.

In this general example, the distance that inductance 510,610 is separated by is approximately the big order of magnitude of physical size than inductance 510,610 itself.In this scope, the coupling coefficient K between the inductance 510,610 is very little, is 0.001 or littler for example, this means that any to attempt between resonator circuit 500,600 transmission of power by traditional inductance coupling high all will be poor efficiency extremely.The value of coupling coefficient K can be provided by equation:

$K=\frac{M}{\sqrt{L_1{\mathrm{<figure-callout\; id="1"\; label="L"\; filenames="HPA00001160385800031.png,HPA00001160385800051.png"\; state="\{\{state\}\}">L</figure-callout>}}_1}}$

Wherein, M is the mutual inductance between the resonator circuit 500,600.Coupling coefficient K has minimum value 0 and maximum 1.

Fig. 3 shows the Equivalent Transformer circuit that is used for the first and second RLC resonator circuits 500,600.The resonance frequency f that is not equal to the 2nd RLC resonator circuit 600 when the frequency of time dependence current source 540 ₀The time, second resonator circuit is owing to insignificant inductance L K is bypassed.Thereby, few or do not have power to be transferred to load.Yet when satisfying the condition that is coupled for resonant inductance, this situation is reversed as explaining in the example that provides below.

Carrying out in the example of power transfer the resonance frequency f of resonator circuit 500,600 by the resonant inductance coupling ₀Be equal to each other, the size of the Q value of resonator circuit 500,600 (by resistance 530,630 expression) is very high, and for example 100 or more, perhaps 1,000 or more.When at following resonance frequency f ₀When the place provides electric current by current source 540:

$f_0=\frac{1}{2\mathrm{\&pi;}\sqrt{L_1{\mathrm{<figure-callout\; id="1"\; label="C"\; filenames="HPA00001160385800031.png,HPA00001160385800051.png"\; state="\{\{state\}\}">C</figure-callout>}}_1}}$

Electric current in first inductor 510 makes and generate disappearance magnetic field in the close region around first inductor 510.Second inductor 610 is subjected to this magnetic field, and this magnetic field makes that electric current is inducted.Like this, the electric current in first inductor 510 is routed via second inductor 610.Under these conditions, the inductance L K in the Equivalent Transformer circuit shown in Fig. 3 comes tuning with less important resonator circuit.Thereby the Equivalent Transformer circuit shown in Fig. 3 can be reduced to the circuit of single electrical resonator as shown in Figure 4.For can be in this way not limiting from the quantity of the less important resonator circuit of main resonator circuit received current.

The impedance of the individual component of the Equivalent Transformer circuit shown in Fig. 3 is shown in Figure 5.Therefore the impedance Z of simplifying circuit can be calculated as follows:

$Z=\frac{\mathrm{j\&omega;LK}.Z_{\sec \mathrm{ondary}}}{\mathrm{j\&omega;LK}+Z_{\sec \mathrm{ondary}}}$

If the Q value of less important resonator circuit 600 is very high, then Z _SecondaryCan be written as: Z _Secondary=j ω L (1-K)+1/jwC

$Z=\frac{\mathrm{j\&omega;LK}.(\mathrm{j\&omega;L}(1-K)+1/\mathrm{j\&omega;C})}{\mathrm{j\&omega;LK}+(\mathrm{j\&omega;L}(1-K)+1/\mathrm{j\&omega;C})}$

$=\frac{\mathrm{j\&omega;LK}.(\mathrm{j\&omega;L}(1-K)-\mathrm{j\&omega;L})}{\mathrm{j\&omega;LK}+(\mathrm{j\&omega;L}(1-K)-\mathrm{j\&omega;L})}$ (wherein when resonance, 1/j ω C=-j ω L)

$=\frac{\mathrm{j\&omega;LK}.(-\mathrm{j\&omega;LK})}{\mathrm{j\&omega;LK}-\left(\mathrm{j\&omega;LK}\right)}$

∴ when reaching the condition of resonant inductance coupling, | Z| → ∞.

Therefore, less important resonator circuit can be by tuning so that be coupled from any main resonator circuit received energy by resonant inductance.

Fig. 6 has illustrated the universal relation between the efficiency eta of the wireless energy transfer of being undertaken by the main reactance of the distance of the big order of magnitude of splitting ratio reactance physical size and the inductance coupling high between the less important reactance.The efficiency eta of wireless energy transfer uses logarithmic scale at vertical plot on X axis, the resonance frequency f between the reactance ₀Difference on transverse axis, draw.For example, this relation can be applicable to the non-radiative wireless energy transfer between the less important inductor 211 of the main inductor 111 of the device for feeding 100 shown in Fig. 7 and portable equipment 200.

As can be seen, as the resonance frequency f that is associated with reactance ₀When being equal to each other, the efficiency eta of the non-radiative wireless energy transfer between the reactance is maximum.And the efficiency eta of the wireless energy transfer between the reactance is along with the resonance frequency f that is associated with reactance ₀Between difference increase and reduce significantly.Therefore, as mentioned above, for the efficient transmission of power with maximum possible, reactance has approaching as far as possible each other resonance frequency f ₀Be preferable.In theory, resonance frequency f ₀Should be identical.

When satisfying condition

The time can obtain optimum state by the effective energy transmission of resonant inductance coupling.At this, Γ represent since inherent loss and with first reactance and second reactance in the line-spacing of each resonance that is associated.This line-spacing and Q factor are inversely proportional to, and it is the yardstick of the sharpness of resonance.

In addition, as previously mentioned, the energy transmission efficiency between main reactance and the less important reactance is directly proportional with the size of the Q value that is associated with reactance; For high efficiency power transfer, the size of Q value should be very big.For example, under the as above situation about 200 the described main and less important inductor 111,211 of power transfer from device for feeding 100 to portable equipment, the effective energy transmission can be with 100 rank or the Q value Q of high-order more ₁₁₁, Q ₂₁₁Realize.And, the resonance frequency f that is associated with inductance 111,211 _{0 (111)}, f _{0 (211)}Between relative mistake should be littler than the inverse of the Q value of their associations.With the relative mistake greater than the inverse of Q value, the efficient of power transfer reduces 1/Q ²

Fig. 7 and Fig. 8 have illustrated when the distance between the reactance during than the big order of magnitude of reactance physical size, the difference between traditional inductance coupling high and the resonance inductance coupling high, and reactance for example is main and less important inductor 111,211.Referring to Fig. 7, with traditional inductance coupling high, just when the difference of the resonance frequency that is associated with inductor 111,211 is outside above-mentioned restriction, the less important inductor 211 in magnetic field 400 from main inductor 111 to portable equipment 200 has only insignificant energy process.By contrast, referring to Fig. 8, as the resonance frequency f that is associated with inductance 111,211 ₀When being complementary, energy can carry out tunnel transmission via magnetic field 400 by the resonant inductance coupling of the less important inductor 211 of the main inductor 111 from device for feeding 100 in the mancarried electronic aid 200.

For simple and clear for the purpose of, top example has been discussed the power transfer from main inductor 111 to single less important inductor 211.Yet, alternatively, also can from main inductor 111 to a plurality of all with identical resonance frequency f ₀Less important inductor 211 transmission of power that are associated, thus make a plurality of portable equipments 200 can be potentially from single device for feeding 100 received energy wirelessly.

Like this, be not easy to install in the environment of network supply socket, device for feeding 100 can for example provide energy to mancarried electronic aid 200 on several meters the intermediate range.For example, to be similar to the mode that WLAN is installed in cafe and restaurant, the network 700 of device for feeding 100 can be installed in public places everywhere so that provide power supply at its mancarried electronic aid 200 to public member.This class public place for example can be cafe, restaurant, bar, shopping center or library.Alternatively, device for feeding can be installed in the private site, for example in the inside or family of personal automobile.

For the electromotive force of the network 700 that maximizes this class device for feeding 100, preferably, the capacity of device for feeding 100 can provide energy to portable equipment 200 as much as possible.A kind of mode that can realize this point is to realize the standardization level of the characteristic of the reactance of using (for example main and less important inductor 111,211) in device for feeding 100 and the mancarried electronic aid 200.Especially, if the resonance frequency f that is associated with main reactance in each device for feeding 100 of network 700 ₀All identical, then will be preferred.This will make the manufacturer of portable equipment 200 and other electric equipments to install and same standardized resonance frequency f to their equipment ₀The less important reactance that is associated.

Yet, it will be appreciated by those skilled in the art that because manufacturing tolerance and may being difficult to allows all inductors of extensive manufacturing all have just in time and identical resonance frequency f ₀The precision grade that is associated.This can cause the resonance frequency f of device for feeding 100 ₀And the resonance frequency f of portable equipment 200 ₀All change.And, even can being manufactured into portable equipment 200, device for feeding 100 has identical resonance frequency f in a vacuum ₀, the resonance frequency f of each individual cell ₀Also can be subjected to the influence of other inductors in this unit surrounding environment in use.The reformed amount of the resonance frequency of each unit will depend on the quantity and the degree of approach of other inductors.

Therefore, even attempted resonance frequency f to device for feeding and portable equipment ₀Carry out standardization, make intolerance (manufacturing intolerance) and environmental condition and still might the power transfer by the resonant inductance coupling be thrown into question.

A kind of mode of alleviating this problem is to provide wireless energy transmission equipment 210 to mancarried electronic aid 200, changes the resonance frequency f that is associated with less important inductor 211 after their production to be used for characteristic according near device for feeding 100 ₀This provides ability to come the resonance frequency f of tuning its inductor to mancarried electronic aid 200 ₀Mating the frequency in the disappearance magnetic field that produces around the main inductor 111 in the nigh device for feeding 100, and therefore by the resonant inductance received energy wirelessly that is coupled.

An exemplary embodiment of the mancarried electronic aid 200 of received energy is presented below to be suitable for being coupled wirelessly by resonant inductance.Referring to Fig. 9, mancarried electronic aid 200 comprises the have power supply unit wireless energy transmission equipment 210 of (PSU), in order to provide electric energy from the magnetic field received energy and to the electric component 240 of portable equipment 200.Alternatively, as discussed below, electric energy can be offered the rechargeable chemical cell 250 of mancarried electronic aid 200.

In following example, magnetic field will be mentioned in the environment in the magnetic field 400 that is produced by the electric current that flows through the main inductor 111 in the device for feeding 100.Yet the technical staff should be appreciated that this magnetic field also can be alternatively corresponding to the magnetic field that is produced by another device for feeding or any other suitable magnetic field sources.

Wireless energy transmission equipment 210 can be controlled by the microcontroller 220 that is integrated in the energy transmission equipment 210, and can comprise the receiving-member 211a that comprises at least one reactance, in order to by non-radiative energy transmission from magnetic field 400 that the resonant inductance coupling produces received energy wirelessly.More particularly, as mentioned above, apply AC voltage, can in receiving-member 211a, come induced potential by the magnetic field 400 that around main inductor 111, generates by main inductor 111 to power supply 110 places.When receiving-member 211a is coupled to load in the mancarried electronic aid, electrical power from power delivery to this load.As described in reference Figure 10, this class load can comprise at least one switched-mode power supply.In this example, receiving-member 211a comprises less important inductor 211.Less important inductor 211 and inductance L ₂₁₁, Q factor Q ₂₁₁And resonance frequency f _{0 (211)}Be associated.

As be described in greater detail below, wireless energy transmission equipment 210 can also comprise supervisory circuit 230, it is arranged to the magnetic field 400 that produces around the main inductor 111 of detection in device for feeding 100.After detecting magnetic field 400, supervisory circuit 230 and microcontroller 220 can be further configured to detect and monitor the resonance frequency f that is associated with main inductor 111 _{0 (111)}

The characteristic of supervisory circuit 230 makes portable equipment 200 received energy wirelessly on intermediate range distance, and wherein said intermediate range distance for example is the distance than the big at least order of magnitude of overall dimension of main and less important inductor 111,211.

Come referring to Figure 10 in conjunction with Fig. 9, in an example, the receiving-member 211a of wireless energy transmission equipment 210 has parasitic capacitance C and is connected to a plurality of switched-mode power supplies (SMPS) 212 via diode bridge 213 and LC filter 214.Although the receiving-member shown in Figure 10 comprises single less important inductor 211, yet receiving-member 211a is adaptive and can be coupled to or comprises that additional components is to be used to change resonance frequency.The example of this base part has been shown among Figure 11 and Figure 13.The purpose of LC filter 214 is to guarantee constant reactive load is introduced less important inductor 211.If resistance ground loaded cable device 211, the Q value Q that then is associated with inductor 211 ₍₂₁₁₎Can have substantial degradation, this greatly reduces the efficient of carrying out power transfer from device for feeding 100 then as previously mentioned.

Diode bridge 213 and LC filter 214 also protect inductor 211 not to be directly exposed under the load of the acute variation in time that is presented by SMPS 212, and each circuit that SMPS 212 is arranged to mancarried electronic aid 200 provides the electric power that receives by the resonant inductance coupling that comes self-magnetic field 400.For example, as shown in Figure 9, SMPS 212 can be configured to recharge being used to rechargeable chemical cell 250 power supply of mancarried electronic aid 200.

Alternatively, SMPS 212 can be arranged to directly and power to the electric component 240 of mancarried electronic aid 200, and chemical cell 250 serves as stand-by power supply.For example, when wireless energy transmission equipment 210 did not receive electric power by the resonant inductance coupling, chemical cell 250 can be configured to only power to the electric component 240 of mancarried electronic aid 200.If device for feeding 100 becomes widely distributed, then there is no need in portable equipment 200, to comprise rechargeable battery 250.

Figure 11 shows the example of adaptive reception parts 211a.The resonance characteristic of adaptive reception parts 211a can be by the tuning resonance characteristic that is associated with main inductor 111 in the device for feeding 100 with coupling.If resonance frequency f _{0 (211)}Be different from the resonance frequency that is associated with main inductor 111 in the device for feeding 100, then these class adaptive reception parts provide the resonance frequency f that wants reformed receiving-member 211a _{0 (211)}Necessary tunable degree.

In an example, as shown in figure 11, receiving-member 211a comprises at least one the less important inductor 211 that is coupled to array of capacitors 215 alternatively.The electric capacity of each capacitor 215 is all different with other capacitors.For example, as shown in figure 11, capacitor 215 can comprise N capacitor, has capacitor C respectively ₀, C ₀/ 2 ... C ₀/ 2 ^N-1In the capacitor 215 each can be coupled to less important inductor 211 alternatively to influence the capacitor C of receiving-member 211a ₂₁₁Thereby, change the resonance frequency f that is associated with inductor 211 _{0 (211)} Capacitor 215 and less important inductor 211 be connected and disconnection provides a kind of mechanism, rely on this mechanism the resonance frequency of receiving-member 211a can be changed over to be complementary and therefore can be by the resonant inductance received energy that is coupled with the frequency of transmitting main inductor.Therefore, portable equipment 200 can be with the resonance frequency f that is associated with less important inductor 211 _{0 (211)}Follow the resonance frequency f that is associated with main inductor 111 in the device for feeding 100 _{0 (111)}Coupling.Should be appreciated that the resonance frequency f that is associated with less important inductor 211 _{0 (211)}Also can be changed by the inductance that changes receiving-member 211a.

In this was implemented, as shown in Figure 11, array of capacitors 215 was coupled to the control unit 216 in the microcontroller 220, so that according to the capacitor C of controlling receiving-member 211a from the control signal of supervisory circuit 230 automatically ₂₁₁ Microcontroller 220 can comprise memory and signal processing apparatus 217, for example comprise microprocessor 218, it is configured to computer program being used for by the resonance frequency that supervisory circuit 230 detects and monitoring is associated with main inductor 111, and is used for analyzing from the control signal of supervisory circuit 230 so that connection and disconnection by array of capacitors 215 each capacitor change the resonance frequency that is associated with less important inductor 211.

Like this, control unit 216 can be with the resonance frequency f of receiving-member 211a _{0 (211)}Be adapted to and make it equal the resonance frequency f that is associated with main inductor 111 _{0 (111)}Thereby, initiate the resonant inductance coupling between main inductor 111 and the less important inductor 211.

Supervisory circuit 230 can be coupled to from the output of LC filter 214 when being used for detecting less important inductor 211 at induced potential, and therefore when be used for detecting mancarried electronic aid 200 is in magnetic field 400.For example, the output of LC filter 214 can be coupled to the input of the AD converter 231 that can be integrated in the supervisory circuit 230, to be used for voltage that the less important inductor 211 of sensing inducts and to provide the expression signal to calculate the resonance frequency that is associated with main inductor 111 to microcontroller 220.Then, can change the resonance frequency that is associated with less important inductor 211 by the resonance frequency that changes adaptive reception parts 211a so that be complementary with the calculating resonance frequency of main inductor 111.

Alternatively, as shown in Figure 9, supervisory circuit 230 can comprise independent winding 232, in order to provide the induced potential signal to AD converter 231.

Supervisory circuit 230 can be very sensitive to the weak voltage of for example microvolt order of magnitude of inducting in the less important inductor 211, even and can be configured to also can detect magnetic field 400 when receiving-member 211a is the detuning state.Therefore, even the resonance frequency f that is associated with main inductor 111 _{0 (111)}Be not equal to the resonance frequency f that sets for the less important inductor in the mancarried electronic aid 200 211 _{0 (211)}, supervisory circuit 230 also can detect the existence of main inductor 111.

Referring to Figure 12 and Figure 13, in an example, supervisory circuit 230 is included in the application-specific integrated circuit (ASIC) (ASIC) 3000, comprises the resonance frequency f of the power supply 110 of main inductor 111 in order to basis _{0 (111)}Change the resonance frequency f of adaptive reception parts 211a _{0 (211)}In this example, receiving-member 211a can comprise at least one less important inductor 211, and supervisory circuit can comprise measurement winding 211b.Measuring winding 211b can be in the outside of ASIC 3000.Measure winding 211b and can have high impedance value, be in the field 400 from power supply 110 even therefore measure winding 211b, the electric current of measuring among the winding 211b also is insignificant.The time time variant voltage u that in measuring winding 211b, inducts by the magnetic field that generates around the main inductor in the power supply 110 111 _211bCan be write as follows:

$u_{211b}\left(t\right)={\mathrm{<figure-callout\; id="211b"\; label="L"\; filenames="HPA00001160385800121.png,HPA00001160385800131.png"\; state="\{\{state\}\}">L</figure-callout>}}_{211b}[\frac{{\mathrm{<figure-callout\; id="211b"\; label="K"\; filenames="HPA00001160385800121.png,HPA00001160385800131.png"\; state="\{\{state\}\}">K</figure-callout>}}_{211b-111}.u_{111}\left(t\right)}{{\mathrm{<figure-callout\; id="111"\; label="L"\; filenames="HPA00001160385800011.png,HPA00001160385800071.png"\; state="\{\{state\}\}">L</figure-callout>}}_{111}}+\frac{{\mathrm{<figure-callout\; id="211b"\; label="K"\; filenames="HPA00001160385800121.png,HPA00001160385800131.png"\; state="\{\{state\}\}">K</figure-callout>}}_{211b-211}.u_{211}\left(t\right)}{L_{211}}]$

Wherein, K _N-mThe coupling coefficient between winding (n) 211b and the main and less important inductor (m) 111,211 is measured in expression.

This equation of recombinating allows and measures the time time variant voltage u that measures among the winding 211b _211bBe used to calculate the time time variant voltage u at main inductor 111 places in the power supply 110 ₁₁₁Unknown phase, as follows:

$u_{111}^{\&prime;}=u_{111}\left[\frac{{\mathrm{<figure-callout\; id="211b"\; label="L"\; filenames="HPA00001160385800121.png,HPA00001160385800131.png"\; state="\{\{state\}\}">L</figure-callout>}}_{211\mathrm{<figure-callout\; id="211b"\; label="b\; K"\; filenames="HPA00001160385800121.png,HPA00001160385800131.png"\; state="\{\{state\}\}">b</figure-callout>}}{K}_{}{}_{211b-111}}{L_{111}}\right]={\mathrm{<figure-callout\; id="211b"\; label="u"\; filenames="HPA00001160385800121.png,HPA00001160385800131.png"\; state="\{\{state\}\}">u</figure-callout>}}_{211b}-u_{211}\left[\frac{{\mathrm{<figure-callout\; id="211b"\; label="L"\; filenames="HPA00001160385800121.png,HPA00001160385800131.png"\; state="\{\{state\}\}">L</figure-callout>}}_{211\mathrm{<figure-callout\; id="211b"\; label="b\; K"\; filenames="HPA00001160385800121.png,HPA00001160385800131.png"\; state="\{\{state\}\}">b</figure-callout>}}{K}_{}{}_{211b-211}}{L_{211}}\right]$

Wherein, u ' ₁₁₁Phase place and the voltage u at power supply 110 places ₁₁₁Phase place identical.

When making portable equipment 200, can measure the inductance value L of less important inductor 211 and measurement winding 211b ₂₁₁And L _211bThereby, by the coupling coefficient K between (for example during the manufacturing of portable equipment 200) less important inductor 211 of measurement and the measurement winding 211b _211b-211Although, do not have physical connection between portable equipment 200 and the power supply 110, also can be when power supply 110 places be calculated at portable equipment 200 places time variant voltage signal u ₁₁₁Phase place.As described in more detail below, voltage signal u ' ₁₁₁The phase place resonance frequency that can be used to regulate receiving-member 211a then.Coupling coefficient k between less important inductor 211 and the measurement winding 211b _211b-211As long as measuredly just can be stored, for example be stored in the nonvolatile memory in the portable equipment 200, and can be called again in use the time at portable equipment 200.

Because at less important inductor 211 with measure the voltage signal of inducting at winding 211b place and can be imported into phase comparator in the portable equipment 200, it is arranged to comparative voltage u ' with the interaction in magnetic field 400 ₁₁₁The voltage u at phase place (voltage-phase that is equal to power supply 110 places) and less important inductor 211 places ₂₁₁Phase place.Phase difference between the voltage signal can be used to the resonance frequency of regulating receiving-member 211a according to the resonance frequency that is associated with main inductor 111 in the power supply 110.This is described hereinafter in more detail.

Referring to Figure 12 and Figure 13, portable equipment 200 can comprise phase comparator, and it is the part of phase-locked loop (PLL) circuit 2000.PLL circuit 2000 can be the part of supervisory circuit 230.PLL circuit 2000 can realize in application-specific integrated circuit (ASIC) 3000, and can be coupled to control unit 216 so that provide control signal to control unit 216, changes the resonance frequency f of receiving-member 211a in order to the resonance frequency according to power supply 11O _{0 (211)}PLL circuit 2000 makes the resonance frequency of receiving-member 211a be tuned to that resonance frequency with power supply 110 is complementary and in response to any variation of the resonance frequency of power supply 110 and be changed.In an example, control unit 216 is realized in ASIC 3000.

As shown in Figure 12, ASIC 3000 comprises five functional block 3l00,3200,3300,3400,3500.Comprise first and second differential amplifiers 3110,3120 for first 3100, they be arranged to measurement by the magnetic field 400 that around main inductor 111, generates respectively at less important inductor 211 with measure the voltage u that winding 211b place inducts ₂₁₁, u _211bComprise third and fourth differential amplifier 3210,3220 for second 3200, they are connected to receive the output from first and second differential amplifiers 3110,3120.Third and fourth differential amplifier 3210,3220 is arranged to the time time variant voltage u that exports respectively at less important inductor 211 places ₂₁₁With the time time variant voltage u ' ₁₁₁Voltage u ' ₁₁₁Voltage u with power supply 110 places ₁₁₁Homophase.

At the 3rd 3300 places, be fed to first and second analog to digital converters (ADC) 3310,3320 from the signal of third and fourth differential amplifier 3210,3220, thereafter and then first and second high pass filters 3330,3340.This has removed the DC component from signal.

Comprise phase comparator 3410 for the 4th 3400, it comprises connected XOR gate in this example, in order to each from high pass filter 3330,3340 receives highest significant position (MSB) in its input.During resonance, for example work as the resonance frequency f of receiving-member 211a _{0 (211)}Equal the resonance frequency f of power supply 110 _{0 (111)}The time, the voltage u at less important inductor 211 places ₂₁₁Voltage u with power supply 110 places ₁₁₁Between phase difference can be pi/2.Therefore, when resonance, the output of XOR gate 3410 can all be high (being that duty ratio is 50%) in the half the time of each circulation.This is balanced easily situation.

Comprise low pass filter 3510 for the 5th 3500, it is connected to receive in its input from the output of phase comparator 3410 and to control unit 216 and exports the capacitance of control signals with control receiving-member 211a, thereby changes the resonance frequency f of receiving-member 211a according to the resonance frequency of power supply 110 _{0 (211)}

In order to clearly illustrate the parts of PLL circuit 3000, Figure 12 shows the adaptive reception parts that comprise single inductor and capacitor.Yet, the structure of adaptive reception parts 211a also can comprise or corresponding Figure 11 and Figure 13 shown in receiving-member.Receiving-member can comprise or be coupled to extra parts to change resonance frequency.The example of this base part has been shown among Figure 11 and Figure 13.And, Figure 11 in Figure 13 for clarity sake, omitted the coupling between receiving-member 211a and the switched-mode power supply 212.Yet, should be appreciated that Figure 11 can be coupled to one or more switched-mode power supplies 212 to the receiving-member 211a shown in Figure 13, so that be the electric component power supply of mancarried electronic aid, for example as shown in Figure 10.

In an example, during the manufacturing of portable equipment 200, second 3200 input impedance is conditioned, so that under the situation from the field 400 of power supply 110 not, the output of the differential amplifier 3210,3220 in second 3200 is insignificant.For example, this can realize by the following: in conjunction with the variable impedance component shown in Figure 12 3230 and value that this variable impedance component 3230 is set to guarantee that in the output that does not have differential amplifier 3210 under 400 the situation be insignificant.For example use the conduction mode excitation, the value of variable impedance component 3230 can be provided with at the manufacturing or the test period of portable equipment 200.The optimum input impedance value of variable impedance component 3230 can be stored in the nonvolatile memory for future use.

Comprise variable impedance component and eliminated the u ' that shows factor due to down ₁₁₁And u ₂₁₁Between the component of phase difference:

Wherein, ${\mathrm{<figure-callout\; id="111"\; label="u"\; filenames="HPA00001160385800011.png,HPA00001160385800071.png"\; state="\{\{state\}\}">u</figure-callout>}}_{111}^{\&prime;}=u_{111}\left[\frac{{\mathrm{<figure-callout\; id="211b"\; label="L"\; filenames="HPA00001160385800121.png,HPA00001160385800131.png"\; state="\{\{state\}\}">L</figure-callout>}}_{211\mathrm{<figure-callout\; id="211b"\; label="b\; K"\; filenames="HPA00001160385800121.png,HPA00001160385800131.png"\; state="\{\{state\}\}">b</figure-callout>}}{K}_{}{}_{211b-111}}{L_{111}}\right]$

Thereby and reduced PLL by probability to the false equilibrium state-driven.

The phase difference component of this factor rises (as described below be " significantly " component in the phase difference) owing to manufacturing tolerance in the interlock circuit parts (manufacturing tolerance) or the like changes due to.Eliminate and to have prevented the weakened synchronously of PLL by " significantly " phase difference component, thereby and prevented that also the PLL circuit from being driven to false equilibrium.

Referring to Figure 13, receiving-member 211a can comprise a pair of less important inductor 211 that is coupled to the fixed-value capacitors 4000 and first and second variable capacitance diodes 5000,6000.Alternatively, this can be replaced by the tapped single inductor 211 that has between two symmetric parts and two parts less important inductor 211.First and second variable capacitance diodes 5000,6000 are coupled with (for example, via control unit 216) receive control signal from PLL circuit 2000, and be configured to and make the electric capacity of variable capacitance diode 5000,6000 change in response to the output of PLL circuit 2000.Using of variable capacitance diode 5000,6000 provides the means of introducing the successive range of potential capacitance as receiving-member 211a, thereby the means that change the resonance frequency of receiving-member 211a according to the resonance frequency of power supply 110 are provided.And the use of variable capacitance diode 5000,6000 provides cheap and compact means, in order to change the electric capacity of receiving-member 211a.As shown in Figure 13, this enforcement of receiving-member 211a be about the ground symmetry or about the reference potential symmetry.

As shown in figure 14, wireless energy transmission equipment 210 can comprise memory 219, is used for storing the resonance frequency f with varying environment ₀Frequency value corresponding is so that can regulate the resonance frequency that is associated with less important inductor 211 automatically after mancarried electronic aid 200 enters specific environment.For example, the control signal that can receive by the antenna of portable equipment 200 is pointed out so automatic adjusting, indicates this equipment 200 to enter familiar environment.Memory 219 can also be suitable for storing the values for tuning between the various life cycle state.Memory 219 can comprise does not lose each resonant frequency value f that is stored in the memory 219 when nonvolatile memory cuts off the power supply with convenient equipment 200 ₀

Shown in Figure 12 in a manner mentioned above with the step that the initiation of wireless energy transfer between power supply 110 (for example comprising main inductor 111) and the mancarried electronic aid 200 is associated.

Referring to Figure 14, as mentioned above, the existence in the magnetic field 400 that first step S1 will be at supervisory circuit 230 places be associated by the power supply 110 that detects from induced potential detects the existence of power supply 110.In device for feeding 100, power supply 110 can comprise main inductor 111.The second step S2 will calculate the also resonance frequency of monitoring power supply 110, and third step S3 is the resonance frequency that changes the receiving-member 211a that comprises less important inductor 211 according to the resonance frequency of power supply 110.In order to initiate wireless energy transfer with the highest possible efficient, third step S3 relates to the resonance frequency of receiving-member 211a and the resonance frequency of power supply 110 is mated.After finishing these steps, the 4th step S4 will be at receiving-member 211a place be coupled from power supply 110 received energy wirelessly by resonant inductance, and the 5th step S5 will provide energy to one or more parts 240 of portable equipment 200.

If the wireless energy transfer between power supply 110 and the portable equipment 200 stops, for example because portable equipment 200 shifts out outside the scope, so, as mentioned above, in step S6, chemical cell 250 can be configured to provide electric energy to the parts 240 of portable equipment 200.As shown in figure 12, in step S7, when being initiated again, stop to provide electric energy from battery 250 by the wireless energy transfer of resonant inductance coupling.

Above example the resonance frequency using adaptive reception parts 211a to change to be associated with less important inductor 211 in the mancarried electronic aid 200 has been discussed so that the detected resonance frequency that the resonance frequency coupling that is associated with less important inductor 211 is associated with main inductor 111 in the device for feeding 100.Yet, be appreciated that self-adaptive component can alternatively be used in the device for feeding 100 so that the resonance frequency that the resonance frequency coupling that is associated with main inductor in the device for feeding 100 is associated with less important inductor in the mancarried electronic aid.

For example, mancarried electronic aid 200 can be configured to provide control signal so that provide the resonance characteristic of the less important inductor in the mancarried electronic aid to device for feeding 100 to device for feeding 100.Device for feeding 100 can be associated the resonance frequency that is associated with its main inductor coupling then with less important inductor in the portable equipment 200 resonance frequency is initiated the wireless energy transfer that is coupled by resonant inductance thus.

In another is alternative, the power supply of device for feeding can comprise the main inductor that is driven by amplifier, and the microcontroller of mancarried electronic aid can be configured to the resonance frequency of adaptive reception parts is matched with the frequency in the detected magnetic field that is associated with power supply.

In the example of Tao Luning, portable equipment 200 comprises mobile phone or PDA in the above.Yet, be appreciated that portable equipment can alternatively comprise other equipment of any amount, for example laptop computer or digital music player.Should also be appreciated that: the invention is not restricted to provides electric power to mancarried electronic aid, but can be used to wide in range various other power electronic equipment.For example, the network of device for feeding can be installed to be used at home to electric light and the power supply of other household electrical appliance.The foregoing description and alternatively can use separately or be used in combination to reach effect provided by the invention.

Claims (34)

1. equipment comprises:

Supervisory circuit is configured to the resonance frequency of monitoring power supply;

Receiving-member; And

Control unit is configured to change the resonance frequency of described receiving-member, and wherein said equipment is configured to according to the described resonance frequency that changes described receiving-member from the signal of described supervisory circuit.

2. equipment as claimed in claim 1, wherein said receiving-member are suitable for being coupled from described power supply wireless ground received energy by resonant inductance.

3. equipment as claimed in claim 1 or 2, wherein said receiving-member comprise the adaptive reception parts with variable resonant frequency.

4. each described equipment of claim as described above, wherein said equipment is configured to the described resonance frequency of the described resonance frequency of described receiving-member and described power supply is complementary.

5. each described equipment of claim as described above, wherein in described receiving-member, come induced potential, and described control unit is configured to change the described resonance frequency of described receiving-member to mate the described resonance frequency of described power supply by the magnetic field that generates by described power supply.

6. as each described equipment of claim 2 to 5, wherein said equipment also comprises a plurality of electric components, and described equipment be configured in these electric components at least one electric energy is provided.

7. equipment as claimed in claim 6 also comprises battery, and it is used for not providing electric energy at least one of described electric component when described power supply receives energy.

8. each described equipment of claim as described above, wherein said equipment comprises mancarried electronic aid.

9. each described equipment of claim as described above, wherein said equipment comprises mobile phone.

10. each described equipment of claim as described above, wherein said equipment comprises PDA(Personal Digital Assistant).

11. each described equipment of claim as described above, wherein said equipment comprises laptop computer.

12. each described equipment of claim as described above, wherein said equipment comprises phase-locked loop circuit, and it is configured to export control signal, is used for changing according to the described resonance frequency of described power supply the described resonance frequency of described receiving-member.

13. each described equipment of claim as described above, wherein said receiving-member are configured to receive electric energy by the wireless non-radiative energy transmission from described power supply, and are configured to provide the electric energy that receives to rechargeable battery.

14. an equipment comprises:

Be used to detect the device of the existence of power supply;

Be used to monitor the device of the resonance frequency of described power supply; And

Be used for changing the device of the resonance frequency of receiving-member according to the described resonance frequency of described power supply.

15. equipment, comprise the receiving-member that is used for from power supply wireless ground received energy with variable resonance characteristic, the described resonance characteristic of wherein said receiving-member can change mating the resonance characteristic of described power supply, thereby improves the efficient from described power supply received energy.

16. equipment as claimed in claim 15 also comprises supervisory circuit, is used to detect and monitor the described resonance characteristic of described power supply.

17. as claim 15 or 16 described equipment, wherein said receiving-member comprises the adaptive reception parts with variable resonance characteristic, and described equipment also comprises:

Control unit is configured to change automatically the described resonance characteristic of described adaptive reception parts to mate the described resonance characteristic of described power supply.

18. as each described equipment of claim 15 to 17, wherein said equipment also comprises one or more electric components, and described receiving-member is coupled to power supply circuits with at least one power supply in these electric components.

19. equipment as claimed in claim 18 also comprises battery, it is used for not providing electric energy at least one of described electric component when described power supply receives energy.

20. as each described equipment of claim 15 to 19, wherein said equipment comprises mancarried electronic aid.

21. as each described equipment of claim 15 to 20, wherein said equipment comprises mobile phone.

22. as each described equipment of claim 15 to 20, wherein said equipment comprises PDA(Personal Digital Assistant).

23. as each described equipment of claim 15 to 20, wherein said equipment comprises laptop computer.

24. as each described equipment of claim 15 to 23, wherein said equipment comprises phase-locked loop circuit, it is configured to export control signal, is used for changing according to the described resonance frequency of described power supply the described resonance frequency of described receiving-member.

25. each described equipment of claim as described above, wherein said receiving-member are configured to receive electric energy by the wireless non-radiative energy transmission from described power supply, and are configured to provide the electric energy that receives to rechargeable battery.

26. a system comprises:

Power supply; And

Equipment, described equipment comprises:

Supervisory circuit is configured to monitor the resonance frequency of described power supply;

Receiving-member; And

Control unit is configured to change the resonance frequency of described receiving-member, and wherein said equipment is configured to according to the described resonance frequency that changes described receiving-member from the signal of described supervisory circuit.

27. a method comprises:

Detect the existence of power supply;

Monitor the resonance frequency of described power supply; And

Change the resonance frequency of receiving-member according to the described resonance frequency of described power supply.

28. method as claimed in claim 27 also comprises:

From phase-locked loop circuit output control signal, be used for changing the described resonance frequency of described receiving-member according to the described resonance frequency of described power supply; And

The described resonance frequency of described receiving-member and the described resonance frequency of described power supply are complementary.

29., also comprise as claim 27 or 28 described methods:

Be coupled from described power supply wireless ground received energy by resonant inductance at described receiving-member place.

30. as each described method of claim 27 to 29, wherein said receiving-member comprises the adaptive reception parts with variable resonant frequency, and described method also comprises:

In described adaptive reception parts, use the magnetic field that generates by described power supply to come induced potential; And

The described resonance frequency that changes described adaptive reception parts is to mate the described resonance frequency of described power supply.

31., also comprise electric energy is provided to electronic equipment as each described method of claim 27 to 30.

32. method as claimed in claim 27 also comprises:

Be coupled from described power supply received energy by resonant inductance at described receiving-member place;

At least one parts to electronic equipment provide the energy that receives by the resonant inductance coupling; And

When not providing energy from battery at least one parts of electronic equipment when described power supply receives energy at described receiving-member place.

33. a computer program that is stored on the storage medium, it is arranged to carry out a kind of method when being carried out by processor, and described method comprises:

Detect the existence of power supply;

Monitor the resonance frequency of described power supply; And

Change the resonance frequency of receiving-member according to the described resonance frequency of described power supply.

34., also comprise: receive electric energy by the wireless non-radiative energy transmission from described power supply at described receiving-member place, and provide the electric energy that receives to rechargeable battery as each described method of claim 27 to 32.

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